RawStylusInput.StylusDeviceId Property

Definition

Namespace:

System.Windows.Input.StylusPlugIns

Assembly:

PresentationCore.dll

Gets the identifier of the current stylus device.

public:
 property int StylusDeviceId { int get(); };

public int StylusDeviceId { get; }

member this.StylusDeviceId : int

Public ReadOnly Property StylusDeviceId As Integer

Property Value

Int32

The identifier of the current StylusDevice.

Examples

The following example ensures that the stylus points collected are from the same StylusDevice. This example is part of the bigger example in the RawStylusInput class overview.

// Collect the points as the user draws the stroke.
protected override void OnStylusDown(RawStylusInput rawStylusInput)
{
    // If points is not null, there is already a stroke taking place
    // on the digitizer, so don't create a new StylusPointsCollection.
    if (points == null)
    {
        points = new StylusPointCollection(rawStylusInput.GetStylusPoints().Description);
        points.Add(rawStylusInput.GetStylusPoints());
        currentStylus = rawStylusInput.StylusDeviceId;
    }
}

// Collect the points as the user draws the stroke.
protected override void OnStylusMove(RawStylusInput rawStylusInput)
{
    // Check whether the stylus that started the stroke is the same, and
    // that the element hasn't lost focus since the stroke began.
        if (points != null && currentStylus == rawStylusInput.StylusDeviceId)
    {
        points.Add(rawStylusInput.GetStylusPoints());
    }
}

// Collect the points as the user draws the stroke.
protected override void OnStylusUp(RawStylusInput rawStylusInput)
{
    // Check whether the stylus that started the stroke is the same, and
    // that the element hasn't lost focus since the stroke began.
    if (points != null && currentStylus == rawStylusInput.StylusDeviceId)
    {
        points.Add(rawStylusInput.GetStylusPoints());

        // Subscribe to the OnStylusUpProcessed method.
        rawStylusInput.NotifyWhenProcessed(points);
    }

    points = null;
    currentStylus = 0;
}

' Collect the points as the user draws the stroke.
Protected Overrides Sub OnStylusDown(ByVal rawStylusInput As RawStylusInput)

    ' If points is not null, there is already a stroke taking place
    ' on the digitizer, so don't create a new StylusPointsCollection.
    If points Is Nothing Then
        points = New StylusPointCollection(rawStylusInput.GetStylusPoints().Description)
        points.Add(rawStylusInput.GetStylusPoints())
        currentStylus = rawStylusInput.StylusDeviceId
    End If

End Sub

' Collect the points as the user draws the stroke.
Protected Overrides Sub OnStylusMove(ByVal rawStylusInput As RawStylusInput)

    ' Check whether the stylus that started the stroke is the same, and
    ' that the element hasn't lost focus since the stroke began.
    If Not (points Is Nothing) AndAlso currentStylus = rawStylusInput.StylusDeviceId Then
        points.Add(rawStylusInput.GetStylusPoints())
    End If

End Sub

' Collect the points as the user draws the stroke.
Protected Overrides Sub OnStylusUp(ByVal rawStylusInput As RawStylusInput)

    ' Check whether the stylus that started the stroke is the same, and
    ' that the element hasn't lost focus since the stroke began.
    If Not (points Is Nothing) AndAlso currentStylus = rawStylusInput.StylusDeviceId Then
        points.Add(rawStylusInput.GetStylusPoints())

        ' Subscribe to the OnStylusUpProcessed method.
        rawStylusInput.NotifyWhenProcessed(points)
    End If

    points = Nothing
    currentStylus = 0

End Sub